Electron distribution of two elements P and Q in their outermost shell is shown below. |
Atomic numbers of P and Q are respectively |
A) 9, 17
B) 15, 17
C) 24, 17
D) 17, 24
Correct Answer: C
Solution :
Electron configuration of P :K | L | M | N |
2 | 8 | 8 | 6 |
So, its atomic number = 24 |
Electronic configuration of Q : |
K | L | M | N |
2 | 8 | 7 |
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